how to add turbulent dispersion term in twoPhaseEulerFoam?

Yucheng Fu · April 21, 2015, 10:18

In the twoPhaseEulerFoam/constant/phaseProperties file, there is a term called turbulent dispersion term. But it's left blank in tutorials. Which kind of format should I follow if I want to add that term in the problem?

hester · April 21, 2015, 18:06

Hello,

if you want to use the turbulent dispersion force, you have to define the coefficient Ctd. There are different models defined under twoPhaseEulerFoam/interfacialModels/turbulentDispersionModels/.
A constant coefficient is defined by

Code:

        type            constantCoefficient;
        Ctd             0.1;

There is also a model after Gosman, which I'm not familiar with. It needs a definition of sigma.

If you are unsure what variables need to be defined or how a term is implemented have a look at the source code. In the header-file is often also a reference paper for further reading given.

Regards,
hester

Yucheng Fu · April 28, 2015, 01:04

Hi,hester
Thank you for your help, I think my question is solved
according to your responding!

Quote:

Originally Posted by hester

Hello,

if you want to use the turbulent dispersion force, you have to define the coefficient Ctd. There are different models defined under twoPhaseEulerFoam/interfacialModels/turbulentDispersionModels/.
A constant coefficient is defined by

Code:

        type            constantCoefficient;
        Ctd             0.1;

There is also a model after Gosman, which I'm not familiar with. It needs a definition of sigma.

If you are unsure what variables need to be defined or how a term is implemented have a look at the source code. In the header-file is often also a reference paper for further reading given.

Regards,
hester

April 21, 2015, 10:18	how to add turbulent dispersion term in twoPhaseEulerFoam?	#1
Yucheng Fu New Member Yucheng Fu Join Date: Apr 2015 Posts: 2 Rep Power: 0	In the twoPhaseEulerFoam/constant/phaseProperties file, there is a term called turbulent dispersion term. But it's left blank in tutorials. Which kind of format should I follow if I want to add that term in the problem?

April 21, 2015, 18:06		#2
hester Member Join Date: May 2014 Location: Germany Posts: 32 Rep Power: 12	Hello, if you want to use the turbulent dispersion force, you have to define the coefficient Ctd. There are different models defined under twoPhaseEulerFoam/interfacialModels/turbulentDispersionModels/. A constant coefficient is defined by Code: type constantCoefficient; Ctd 0.1; There is also a model after Gosman, which I'm not familiar with. It needs a definition of sigma. If you are unsure what variables need to be defined or how a term is implemented have a look at the source code. In the header-file is often also a reference paper for further reading given. Regards, hester

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